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101922 3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate

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Key Specifications Table

CAS #EC NumberHill FormulaMolar Mass
149-45-1205-741-5C₆H₄Na₂O₈S₂ * H₂O332.22 g/mol

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      Glass bottle 100 g
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      Catalogue Number101922
      Synonyms1,2-Dihydroxy-3,5-benzenedisulfonic acid disodium salt, di-Sodium 4,5-dihydroxy-1,3-benzenedisulfonate, Sodium pyrocatechol-3,5-disulfonate, Tiron
      Product Information
      CAS number149-45-1
      EC number205-741-5
      Hill FormulaC₆H₄Na₂O₈S₂ * H₂O
      Molar Mass332.22 g/mol
      HS Code2908 99 00
      Structure formula ImageStructure formula Image
      Quality LevelMQ200
      Biological Information
      Physicochemical Information
      Melting Point300 °C
      pH value5.0 (10 g/l, H₂O, 20 °C)
      Bulk density465 kg/m3
      Solubility1350 g/l
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Hazard Pictogram(s) Hazard Pictogram(s)
      Hazard Statement(s)H315: Causes skin irritation.
      H319: Causes serious eye irritation.
      Precautionary Statement(s)P264: Wash skin thoroughly after handling.
      P280: Wear protective gloves/ eye protection/ face protection.
      P302 + P352: IF ON SKIN: Wash with plenty of water.
      P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
      P332 + P313: If skin irritation occurs: Get medical advice/ attention.
      P337 + P313: If eye irritation persists: Get medical advice/ attention.
      Signal WordWarning
      Storage class10 - 13 Other liquids and solids
      WGKWGK 3 highly hazardous to water
      Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
      Safety Information
      Categories of dangerirritant
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +15°C to +25°C.
      Packaging Information
      Transport Information
      Supplemental Information
      Identity (UV/VIS-Spectrum)passes test
      Absorption maximum λmax. (buffer pH 2.5)290 - 291 nm
      Spec. Absorptivity A 1%/1cm (λmax; 0.05 g/l; buffer pH 2.5; calculated on anhydrous substance)100 - 125
      Water (according to Karl Fischer)4.5 - 6.5 %
      Suitability as indicator (for metal titration)passes test


      3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate SDS


      Safety Data Sheet (SDS) 

      3,5-Pyrocatecholdisulfonic acid disodium salt monohydrate Certificates of Analysis

      Product Number PackagingSpecificationLot Number
      1019220100 Glass bottlePDF Specification Document